COMPOSITE SANDWICH ELEMENT

摘要

A composite sandwich element (12) has at least one wall (14) of polymeric resin binder and a layer (18) of cellular polymeric foam or felt bonded thereto. In the presence of fire, the composite sandwich element (12) has a level of heat release below a predetermined level considered suitable for use within the passenger compartment of a commercial aircraft. In preferred embodiments, there are two walls (14, 16) with the cellular polymeric material layer (18) comprising an imide polymeric material disposed therebetween. Preferably, the wall includes glass fibers (22) in web form (20), with the polymeric resin binder material (26) serving as an adhesive or reinforcing binder, and a barrier film, e.g. metallic (38) or polymeric (36), renders the composite sandwich element impermeable to air. A method for forming a composite sandwich element of the invention is also described.